Several states require for a vehicle to pass on-board diagnostic (OBD) system tests and the inspection/maintenance emission inspection in order to renew license plates. This is accomplished by viewing the inspection/maintenance system status display on a scan tool. Using a scan tool, the technician can observe the inspection/maintenance system status in order to verify that the vehicle meets the criteria that comply with the local area requirements.
Each system monitor requires at least one, and sometimes several, diagnostic tests. The result of each test is reported by a diagnostic trouble code (DTC). A system monitor is complete when either all of the DTCs composing the monitor have Run and Passed, or when any one of the DTCs comprising the monitor has illuminated the malfunction indicator lamp (MIL). Once the system monitor is complete, the inspection/maintenance system status display will indicate YES in the completed column.
For example, when the HO2S heater status indicates YES, either all of the oxygen sensor heater tests have passed or one of the tests has illuminated the MIL. If the vehicle has two heated oxygen sensors, either both heater circuit tests have passed or one of the heater circuit tests has illuminated the MIL. The inspection/maintenance system status will indicate NO under the completed column when any of the required tests for that system have not run. The following is a list of conditions that may set the inspection/maintenance system status indicator to NO:
The OBD II System monitors all emission control systems that are on-board. The OBD II regulations require monitoring of the following:
For the specific DTCs required for each system, refer to Inspection/Maintenance (I/M) System DTC Table. Systems such as fuel delivery, misfire, and comprehensive components may not be listed in a system status list. These tests run continuously and do not require an inspection/maintenance system status indicator.
Review the inspection/maintenance system DTC Table System Status indicators. All inspection/maintenance system DTC Table system status indicators should report YES.
Note:
Many DTC related repairs will instruct the technician to clear the DTC information. Clearing the DTC will reset the inspection/maintenance system DTC Table system status indicators to NO. Performing the inspection/maintenance complete system set procedure will set each of the inspection/maintenance system status indicators to YES.
Top Tether Anchor
A top tether (3, 4) anchors the top of the child restraint to the vehicle. A
top tether anchor is built into the vehicle. The top tether attachment (2) on the
child restraint connects to the top tether anchor in the vehicle in order to reduce
the forward movement and rotation of the child re ...
Replacing Safety Belt System Parts after a Crash
Warning: A crash can damage the safety belt system in the vehicle.
A damaged safety belt system may not properly protect the person using it, resulting
in serious injury or even death in a crash. To help make sure the safety belt
systems are working properly after a crash, have them insp ...
Synchronizers Cleaning and Inspection
Note: When servicing the synchronizers, retain them in the order
that they are removed. Mark the parts to ensure the correct position for
inspection and assembly.
Clean all the synchronizer parts in a suitable cleaning
solvent and air dry all the parts.
Inspect the 1 ...